From what I have read, do NOT give your dogs thc; cbd can help, but apparently, canines don’t process thc the same as humans and it is not a good idea. I took the same route as you, trying to provide my 13 year old German shepherd with some pain management. This was several years back and I though I was helping, but having more recently realized that thc is detrimental to dogs, I honestly have a lot of shame and guilt
I was spending over 100$ per week on pain pills wherever I could find them because I simply was not willing to let him go.. I terribly regret having ever given him the thc now that I understand it’s a bad idea.
tldr-don’t do it; cbd for dogs is ok, thc for them is a no-no